ref: 66f413af4f8a0ae318e15929274a84e59068430a
dir: /vp9/decoder/vp9_detokenize.c/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vp9/common/vp9_blockd.h"
#include "vp9/decoder/vp9_onyxd_int.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
#include "vp9/decoder/vp9_detokenize.h"
#include "vp9/common/vp9_seg_common.h"
#define EOB_CONTEXT_NODE 0
#define ZERO_CONTEXT_NODE 1
#define ONE_CONTEXT_NODE 2
#define LOW_VAL_CONTEXT_NODE 3
#define TWO_CONTEXT_NODE 4
#define THREE_CONTEXT_NODE 5
#define HIGH_LOW_CONTEXT_NODE 6
#define CAT_ONE_CONTEXT_NODE 7
#define CAT_THREEFOUR_CONTEXT_NODE 8
#define CAT_THREE_CONTEXT_NODE 9
#define CAT_FIVE_CONTEXT_NODE 10
#define CAT1_MIN_VAL 5
#define CAT2_MIN_VAL 7
#define CAT3_MIN_VAL 11
#define CAT4_MIN_VAL 19
#define CAT5_MIN_VAL 35
#define CAT6_MIN_VAL 67
#define CAT1_PROB0 159
#define CAT2_PROB0 145
#define CAT2_PROB1 165
#define CAT3_PROB0 140
#define CAT3_PROB1 148
#define CAT3_PROB2 173
#define CAT4_PROB0 135
#define CAT4_PROB1 140
#define CAT4_PROB2 155
#define CAT4_PROB3 176
#define CAT5_PROB0 130
#define CAT5_PROB1 134
#define CAT5_PROB2 141
#define CAT5_PROB3 157
#define CAT5_PROB4 180
static const vp9_prob cat6_prob[15] = {
254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0
};
DECLARE_ALIGNED(16, extern const uint8_t, vp9_norm[256]);
static int16_t get_signed(BOOL_DECODER *br, int16_t value_to_sign) {
return decode_bool(br, 128) ? -value_to_sign : value_to_sign;
}
#define INCREMENT_COUNT(token) \
do { \
coef_counts[type][ref][get_coef_band(scan, txfm_size, c)] \
[pt][token]++; \
token_cache[c] = token; \
pt = vp9_get_coef_context(scan, nb, pad, token_cache, \
c + 1, default_eob); \
} while (0)
#if CONFIG_CODE_NONZEROCOUNT
#define WRITE_COEF_CONTINUE(val, token) \
{ \
qcoeff_ptr[scan[c]] = get_signed(br, val); \
INCREMENT_COUNT(token); \
c++; \
nzc++; \
continue; \
}
#else
#define WRITE_COEF_CONTINUE(val, token) \
{ \
qcoeff_ptr[scan[c]] = get_signed(br, val); \
INCREMENT_COUNT(token); \
c++; \
continue; \
}
#endif // CONFIG_CODE_NONZEROCOUNT
#define ADJUST_COEF(prob, bits_count) \
do { \
if (vp9_read(br, prob)) \
val += 1 << bits_count; \
} while (0);
static int decode_coefs(VP9D_COMP *dx, const MACROBLOCKD *xd,
BOOL_DECODER* const br, int block_idx,
PLANE_TYPE type, int seg_eob, int16_t *qcoeff_ptr,
TX_SIZE txfm_size) {
ENTROPY_CONTEXT* const A0 = (ENTROPY_CONTEXT *) xd->above_context;
ENTROPY_CONTEXT* const L0 = (ENTROPY_CONTEXT *) xd->left_context;
int aidx, lidx;
ENTROPY_CONTEXT above_ec, left_ec;
FRAME_CONTEXT *const fc = &dx->common.fc;
int pt, c = 0, pad, default_eob;
vp9_coeff_probs *coef_probs;
vp9_prob *prob;
vp9_coeff_count *coef_counts;
const int ref = xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME;
#if CONFIG_CODE_NONZEROCOUNT
const int nzc_used = get_nzc_used(txfm_size);
uint16_t nzc = 0;
uint16_t nzc_expected =
nzc_used ? xd->mode_info_context->mbmi.nzcs[block_idx] : 0;
#endif
const int *scan, *nb;
uint8_t token_cache[1024];
if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB64X64) {
aidx = vp9_block2above_sb64[txfm_size][block_idx];
lidx = vp9_block2left_sb64[txfm_size][block_idx];
} else if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB32X32) {
aidx = vp9_block2above_sb[txfm_size][block_idx];
lidx = vp9_block2left_sb[txfm_size][block_idx];
} else {
aidx = vp9_block2above[txfm_size][block_idx];
lidx = vp9_block2left[txfm_size][block_idx];
}
switch (txfm_size) {
default:
case TX_4X4: {
const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
get_tx_type_4x4(xd, block_idx) : DCT_DCT;
switch (tx_type) {
default:
scan = vp9_default_zig_zag1d_4x4;
break;
case ADST_DCT:
scan = vp9_row_scan_4x4;
break;
case DCT_ADST:
scan = vp9_col_scan_4x4;
break;
}
above_ec = A0[aidx] != 0;
left_ec = L0[lidx] != 0;
coef_probs = fc->coef_probs_4x4;
coef_counts = fc->coef_counts_4x4;
default_eob = 16;
break;
}
case TX_8X8: {
const BLOCK_SIZE_TYPE sb_type = xd->mode_info_context->mbmi.sb_type;
const int sz = 3 + mb_width_log2(sb_type);
const int x = block_idx & ((1 << sz) - 1);
const int y = block_idx - x;
const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
get_tx_type_8x8(xd, y + (x >> 1)) : DCT_DCT;
switch (tx_type) {
default:
scan = vp9_default_zig_zag1d_8x8;
break;
case ADST_DCT:
scan = vp9_row_scan_8x8;
break;
case DCT_ADST:
scan = vp9_col_scan_8x8;
break;
}
coef_probs = fc->coef_probs_8x8;
coef_counts = fc->coef_counts_8x8;
above_ec = (A0[aidx] + A0[aidx + 1]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1]) != 0;
default_eob = 64;
break;
}
case TX_16X16: {
const BLOCK_SIZE_TYPE sb_type = xd->mode_info_context->mbmi.sb_type;
const int sz = 4 + mb_width_log2(sb_type);
const int x = block_idx & ((1 << sz) - 1);
const int y = block_idx - x;
const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
get_tx_type_16x16(xd, y + (x >> 2)) : DCT_DCT;
switch (tx_type) {
default:
scan = vp9_default_zig_zag1d_16x16;
break;
case ADST_DCT:
scan = vp9_row_scan_16x16;
break;
case DCT_ADST:
scan = vp9_col_scan_16x16;
break;
}
coef_probs = fc->coef_probs_16x16;
coef_counts = fc->coef_counts_16x16;
if (type == PLANE_TYPE_UV) {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
above_ec = (A0[aidx] + A0[aidx + 1] + A1[aidx] + A1[aidx + 1]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1] + L1[lidx] + L1[lidx + 1]) != 0;
} else {
above_ec = (A0[aidx] + A0[aidx + 1] + A0[aidx + 2] + A0[aidx + 3]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1] + L0[lidx + 2] + L0[lidx + 3]) != 0;
}
default_eob = 256;
break;
}
case TX_32X32:
scan = vp9_default_zig_zag1d_32x32;
coef_probs = fc->coef_probs_32x32;
coef_counts = fc->coef_counts_32x32;
if (type == PLANE_TYPE_UV) {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
ENTROPY_CONTEXT *A2 = (ENTROPY_CONTEXT *) (xd->above_context + 2);
ENTROPY_CONTEXT *L2 = (ENTROPY_CONTEXT *) (xd->left_context + 2);
ENTROPY_CONTEXT *A3 = (ENTROPY_CONTEXT *) (xd->above_context + 3);
ENTROPY_CONTEXT *L3 = (ENTROPY_CONTEXT *) (xd->left_context + 3);
above_ec = (A0[aidx] + A0[aidx + 1] + A1[aidx] + A1[aidx + 1] +
A2[aidx] + A2[aidx + 1] + A3[aidx] + A3[aidx + 1]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1] + L1[lidx] + L1[lidx + 1] +
L2[lidx] + L2[lidx + 1] + L3[lidx] + L3[lidx + 1]) != 0;
} else {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
above_ec = (A0[aidx] + A0[aidx + 1] + A0[aidx + 2] + A0[aidx + 3] +
A1[aidx] + A1[aidx + 1] + A1[aidx + 2] + A1[aidx + 3]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1] + L0[lidx + 2] + L0[lidx + 3] +
L1[lidx] + L1[lidx + 1] + L1[lidx + 2] + L1[lidx + 3]) != 0;
}
default_eob = 1024;
break;
}
VP9_COMBINEENTROPYCONTEXTS(pt, above_ec, left_ec);
nb = vp9_get_coef_neighbors_handle(scan, &pad);
while (1) {
int val;
const uint8_t *cat6 = cat6_prob;
if (c >= seg_eob)
break;
#if CONFIG_CODE_NONZEROCOUNT
if (nzc_used && nzc == nzc_expected)
break;
#endif
prob = coef_probs[type][ref][get_coef_band(scan, txfm_size, c)][pt];
fc->eob_branch_counts[txfm_size][type][ref]
[get_coef_band(scan, txfm_size, c)][pt]++;
#if CONFIG_CODE_NONZEROCOUNT
if (!nzc_used)
#endif
if (!vp9_read(br, prob[EOB_CONTEXT_NODE]))
break;
SKIP_START:
if (c >= seg_eob)
break;
#if CONFIG_CODE_NONZEROCOUNT
if (nzc_used && nzc == nzc_expected)
break;
// decode zero node only if there are zeros left
if (!nzc_used || seg_eob - nzc_expected - c + nzc > 0)
#endif
if (!vp9_read(br, prob[ZERO_CONTEXT_NODE])) {
INCREMENT_COUNT(ZERO_TOKEN);
++c;
prob = coef_probs[type][ref][get_coef_band(scan, txfm_size, c)][pt];
goto SKIP_START;
}
// ONE_CONTEXT_NODE_0_
if (!vp9_read(br, prob[ONE_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(1, ONE_TOKEN);
}
// LOW_VAL_CONTEXT_NODE_0_
if (!vp9_read(br, prob[LOW_VAL_CONTEXT_NODE])) {
if (!vp9_read(br, prob[TWO_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(2, TWO_TOKEN);
}
if (!vp9_read(br, prob[THREE_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(3, THREE_TOKEN);
}
WRITE_COEF_CONTINUE(4, FOUR_TOKEN);
}
// HIGH_LOW_CONTEXT_NODE_0_
if (!vp9_read(br, prob[HIGH_LOW_CONTEXT_NODE])) {
if (!vp9_read(br, prob[CAT_ONE_CONTEXT_NODE])) {
val = CAT1_MIN_VAL;
ADJUST_COEF(CAT1_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY1);
}
val = CAT2_MIN_VAL;
ADJUST_COEF(CAT2_PROB1, 1);
ADJUST_COEF(CAT2_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY2);
}
// CAT_THREEFOUR_CONTEXT_NODE_0_
if (!vp9_read(br, prob[CAT_THREEFOUR_CONTEXT_NODE])) {
if (!vp9_read(br, prob[CAT_THREE_CONTEXT_NODE])) {
val = CAT3_MIN_VAL;
ADJUST_COEF(CAT3_PROB2, 2);
ADJUST_COEF(CAT3_PROB1, 1);
ADJUST_COEF(CAT3_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY3);
}
val = CAT4_MIN_VAL;
ADJUST_COEF(CAT4_PROB3, 3);
ADJUST_COEF(CAT4_PROB2, 2);
ADJUST_COEF(CAT4_PROB1, 1);
ADJUST_COEF(CAT4_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY4);
}
// CAT_FIVE_CONTEXT_NODE_0_:
if (!vp9_read(br, prob[CAT_FIVE_CONTEXT_NODE])) {
val = CAT5_MIN_VAL;
ADJUST_COEF(CAT5_PROB4, 4);
ADJUST_COEF(CAT5_PROB3, 3);
ADJUST_COEF(CAT5_PROB2, 2);
ADJUST_COEF(CAT5_PROB1, 1);
ADJUST_COEF(CAT5_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY5);
}
val = 0;
while (*cat6) {
val = (val << 1) | vp9_read(br, *cat6++);
}
val += CAT6_MIN_VAL;
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6);
}
#if CONFIG_CODE_NONZEROCOUNT
if (!nzc_used)
#endif
if (c < seg_eob)
coef_counts[type][ref][get_coef_band(scan, txfm_size, c)]
[pt][DCT_EOB_TOKEN]++;
#if CONFIG_CODE_NONZEROCOUNT
if (!nzc_used)
xd->mode_info_context->mbmi.nzcs[block_idx] = nzc;
else
assert(nzc == nzc_expected);
#endif
A0[aidx] = L0[lidx] = c > 0;
if (txfm_size >= TX_8X8) {
A0[aidx + 1] = L0[lidx + 1] = A0[aidx];
if (txfm_size >= TX_16X16) {
if (type == PLANE_TYPE_UV) {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
A1[aidx] = A1[aidx + 1] = L1[lidx] = L1[lidx + 1] = A0[aidx];
if (txfm_size >= TX_32X32) {
ENTROPY_CONTEXT *A2 = (ENTROPY_CONTEXT *) (xd->above_context + 2);
ENTROPY_CONTEXT *L2 = (ENTROPY_CONTEXT *) (xd->left_context + 2);
ENTROPY_CONTEXT *A3 = (ENTROPY_CONTEXT *) (xd->above_context + 3);
ENTROPY_CONTEXT *L3 = (ENTROPY_CONTEXT *) (xd->left_context + 3);
A2[aidx] = A2[aidx + 1] = A3[aidx] = A3[aidx + 1] = A0[aidx];
L2[lidx] = L2[lidx + 1] = L3[lidx] = L3[lidx + 1] = A0[aidx];
}
} else {
A0[aidx + 2] = A0[aidx + 3] = L0[lidx + 2] = L0[lidx + 3] = A0[aidx];
if (txfm_size >= TX_32X32) {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
A1[aidx] = A1[aidx + 1] = A1[aidx + 2] = A1[aidx + 3] = A0[aidx];
L1[lidx] = L1[lidx + 1] = L1[lidx + 2] = L1[lidx + 3] = A0[aidx];
}
}
}
}
return c;
}
static int get_eob(MACROBLOCKD* const xd, int segment_id, int eob_max) {
return vp9_get_segdata(xd, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
}
/* TODO(jkoleszar): Probably best to remove instances that require this,
* as the data likely becomes per-plane and stored in the per-plane structures.
* This is a stub to work with the existing code.
*/
static INLINE int block_idx_4x4(MACROBLOCKD* const xd, int block_size_b,
int plane, int i) {
const int luma_blocks = 1 << block_size_b;
assert(xd->plane[0].subsampling_x == 0);
assert(xd->plane[0].subsampling_y == 0);
assert(xd->plane[1].subsampling_x == 1);
assert(xd->plane[1].subsampling_y == 1);
assert(xd->plane[2].subsampling_x == 1);
assert(xd->plane[2].subsampling_y == 1);
return plane == 0 ? i :
plane == 1 ? luma_blocks + i :
luma_blocks * 5 / 4 + i;
}
static INLINE int decode_block_plane(VP9D_COMP* const pbi,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc,
int block_size,
int segment_id,
int plane,
int is_split) {
// block and transform sizes, in number of 4x4 blocks log 2 ("*_b")
// 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8
const TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
const int block_size_b = block_size;
const int txfrm_size_b = tx_size * 2;
// subsampled size of the block
const int ss_sum = xd->plane[plane].subsampling_x +
xd->plane[plane].subsampling_y;
const int ss_block_size = block_size_b - ss_sum;
// size of the transform to use. scale the transform down if it's larger
// than the size of the subsampled data, or forced externally by the mb mode.
const int ss_max = MAX(xd->plane[plane].subsampling_x,
xd->plane[plane].subsampling_y);
const int ss_txfrm_size = txfrm_size_b > ss_block_size || is_split
? txfrm_size_b - ss_max * 2
: txfrm_size_b;
const TX_SIZE ss_tx_size = ss_txfrm_size / 2;
// TODO(jkoleszar): 1 may not be correct here with larger chroma planes.
const int inc = is_split ? 1 : (1 << ss_txfrm_size);
// find the maximum eob for this transform size, adjusted by segment
const int seg_eob = get_eob(xd, segment_id, 16 << ss_txfrm_size);
int i, eobtotal = 0;
assert(txfrm_size_b <= block_size_b);
assert(ss_txfrm_size <= ss_block_size);
// step through the block by the size of the transform in use.
for (i = 0; i < (1 << ss_block_size); i += inc) {
const int block_idx = block_idx_4x4(xd, block_size_b, plane, i);
const int c = decode_coefs(pbi, xd, bc, block_idx,
xd->plane[plane].plane_type, seg_eob,
BLOCK_OFFSET(xd->plane[plane].qcoeff, i, 16),
ss_tx_size);
xd->plane[plane].eobs[i] = c;
eobtotal += c;
}
return eobtotal;
}
static INLINE int decode_blocks_helper(VP9D_COMP* const pbi,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc,
int block_size,
int is_split_chroma) {
const int segment_id = xd->mode_info_context->mbmi.segment_id;
int plane, eobtotal = 0;
for (plane = 0; plane < MAX_MB_PLANE; plane++) {
const int is_split = is_split_chroma &&
xd->plane[plane].plane_type == PLANE_TYPE_UV;
eobtotal += decode_block_plane(pbi, xd, bc, block_size, segment_id,
plane, is_split);
}
return eobtotal;
}
static INLINE int decode_blocks(VP9D_COMP* const pbi,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc,
int block_size) {
const MB_PREDICTION_MODE mode = xd->mode_info_context->mbmi.mode;
const TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
return decode_blocks_helper(pbi, xd, bc, block_size,
tx_size == TX_8X8 && (mode == I8X8_PRED || mode == SPLITMV));
}
int vp9_decode_tokens(VP9D_COMP* const pbi,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc,
BLOCK_SIZE_TYPE bsize) {
const int bwl = mb_width_log2(bsize) + 2, bhl = mb_height_log2(bsize) + 2;
return decode_blocks(pbi, xd, bc, bwl + bhl);
}
#if CONFIG_NEWBINTRAMODES
static int decode_coefs_4x4(VP9D_COMP *dx, MACROBLOCKD *xd,
BOOL_DECODER* const bc,
PLANE_TYPE type, int i, int seg_eob) {
const struct plane_block_idx pb_idx = plane_block_idx(16, i);
const int c = decode_coefs(dx, xd, bc, i, type, seg_eob,
BLOCK_OFFSET(xd->plane[pb_idx.plane].qcoeff, pb_idx.block, 16), TX_4X4);
xd->plane[pb_idx.plane].eobs[pb_idx.block] = c;
return c;
}
static int decode_mb_tokens_4x4_uv(VP9D_COMP* const dx,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc,
int seg_eob) {
int i, eobtotal = 0;
// chroma blocks
for (i = 16; i < 24; i++)
eobtotal += decode_coefs_4x4(dx, xd, bc, PLANE_TYPE_UV, i, seg_eob);
return eobtotal;
}
int vp9_decode_mb_tokens_4x4_uv(VP9D_COMP* const dx,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc) {
const int segment_id = xd->mode_info_context->mbmi.segment_id;
const int seg_eob = get_eob(xd, segment_id, 16);
return decode_mb_tokens_4x4_uv(dx, xd, bc, seg_eob);
}
int vp9_decode_coefs_4x4(VP9D_COMP *dx, MACROBLOCKD *xd,
BOOL_DECODER* const bc,
PLANE_TYPE type, int i) {
const int segment_id = xd->mode_info_context->mbmi.segment_id;
const int seg_eob = get_eob(xd, segment_id, 16);
return decode_coefs_4x4(dx, xd, bc, type, i, seg_eob);
}
#endif